US Army Corps of Engineers
Omaha District

L561 Levee Restoration Information

Background: The L561 - Nishnabotna Left Bank & High Creek Right Bank Levee System was damaged during the 2019 runoff event, leading to the Levee Sponsor submitting a Public Law (PL) 84-99 Rehabilitation Assistance request to the US Army Corps of Engineers – Omaha District.

Current Action:  Design funding has been received to begin work on the L561 levee repair project. The purpose of this rehabilitation project is to repair the levee system to its authorized level of flood risk management.

Next Steps:

  1. Complete the Engineering and Design process.
  2. Advertise and award the levee repair construction contract.
  3. Repair the levee system to its authorized level of flood risk management.

Status Updates:

06 September 2019 – The team has identified a few concerns with the initial levee repair design and is working on revising the design.  This also includes coordination with the levee sponsor on the updated path forward with the design.

29 August 2019 – Team continues engineering and design work on repairs for the Nishnabotna levee system. Design is expected to be complete by late summer/early fall at which time a construction contract will be advertised and awarded to repair the system.

13 August 2019 – Engineering and Design (E&D) work continues for rehabilitating the L561 Nishnabotna levee system.  The team is still anticipating to be done with the E&D process by late-summer or early-fall.

31 July 2019 – The USACE Design team and Levee Sponsor conducted a “Plan In-Hand” review of the repair design documents on 30 July 2019.  These reviews are conducted to ensure that the team is developing a technically feasible and acceptable design.

22 July 2019 – Engineering and Design (E&D) work continues.  The team is still anticipating to be done with the E&D process by late-summer or early-fall.

08 July 2019 – Engineering and Design (E&D) work is on-going for rehabilitating the L-561 levee system.  The team is anticipating to be done with the E&D process by late-summer or early-fall.

15 June 2019 – An initial site damage assessment and economic analysis has been completed.  From this initial assessment the USACE team has determined that there are damages to the levee system that are eligible for PL 84-99 Rehabilitation Assistance. 

NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels

L561 Levee Imagery

USACE Engineering and Construction Team and the Local Levee Sponsor conducting the Plan In-Hand Review on the L-561 Nishnabotna Levee July 30, 2019.
Damaged Levee L561 Apr. 23, 2019 near Hamburg, Iowa.
Damaged Levee L561 Apr. 23, 2019 near Hamburg, Iowa.
Damaged Levee L561 Apr. 23, 2019 near Hamburg, Iowa.

Video Gallery

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Aerial View of Levee L561 near Turkey Creek Apr. 15, 2019
U.S. Army Corps of Engineers, Omaha District
April 15, 2019 | 1:10
Aerial view of Levee L561 near Turkey Creek Apr. 15, 2019, following March 2019 runoff event. (Video by Mike Glasch)
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